Plastic composition



Patented Aug. 13, 1929.

UNITED sr rns PATENT QFFICE.

moIsnY M. snnnnnumor, or sAL'r-Yxom, union or soomnrsr sovmr nnronmcs,nussm. v

rmsrrc COMPOSITION.

No Drawing. Appplication filed September 29, 1928, Serial No. 808,574;and in the Union of Soviet *Re ubiics February a, 1926.

My invention relates to plastic composi- 'tions and has aparticularreference to compositions made from waste fibrous materials, such asscrap leather, and to the process of manufacturing these compositions.

The object of my invention is to provide a composition suitable formanufacturing imitation leather, board, linoleum, paper, etc. Y For thispurpose I am using waste material from leather manufacturing plants,such as scrap leather, leather dust etc. These ma-' terials are sortedout to separate foreign articles and are placed in a tank with water. I

-t1on, conslstlng in soaking and heating in Thistank is then heateduntil leather becomes softand expanded. If necessary the water may bebrought to the boiling temperature. About 5% of sodium chloride (NaCl)can be added to the water in order toremove the fat from leather. ,Thissalt also tends to. render the finished product more supple.

In order to increase the plasticity of the product turpentine canjbealso added. By

adding paints or dyes into the mixture the finished product may beobtained of any desired color.

The mixture, when leather becomes thoroughly soaked and softened, is comressed i-nto sheets and plates in cold or, pre erably, hot presses. Theresultant material is very strong and resilient and can be used as asubstitute for leather. 1

Cork can be added to the mixture in which case the product will'haveproperties of an ordinary linoleum.

For manufacturing paper the composition is compressed into logs orblocks of a size materials and the resultant pro uct possesses suitablefor feeding into ordinary grinding and chipping machines in paper mills.The

I paper pulp made from these blocks is suitabIe for manufacturing paperand paper board of 'ordinary commercial grades and using ord nary papermill machinery. Other fibrous materials can be added to the compositionin any suitable quantities.

Important advantages of my composition arethat it utilizes cheap scraand waste good commercial merits.-

I claim as my invention: 1.- In a rocess of making plastic composiwaterleather scrap, addingturpentine, and compressing same into sheets.

2. In a process of making plastic compos1tion,'consisting in soaking andheating in water leather scrap, adding sodium chloride and turpentineand compressing the resultant mixture into sheets.

3. In a process of making paper, consisting in soaking and heating inwater leather scrap, adding turpentine, compressing same into blocks,and making pulp and paper from said blocks by ordinary processes used inthe manufacture of paper.

4-. 'Aplastic composition, made of leather scrap, s'oak'edand heated inwater with turpentine and compressedinto sheets.

5'. A plastic composition, made of leather scrap, soaked and heated inwater with sodium chloride and turpentine, and compressed into sheets. I

In testimony whereof I aflix my signature.

MoIsn M. SEREBRIANOI.

